//
// Created by 束庆乐 on 2024/12/20.
//
#include <stdio.h>
int main024(){
    int num = 10;
    if(num>0){
        printf("num是一个正数：%d\n",num);
    }
    int score = 90;
    if(score >=90){
        printf("成绩A\n");
    }else if(score>=80){
        printf("成绩B\n");
    }else if(score>=70){
        printf("成绩C\n");
    }else{
        printf("不合格");
    }

    int day = 3;
    switch (day) {
    case 1:
        printf("星期一\n");
        break;
    case 2:
        printf("星期二\n");
        break;
    case 3:
        printf("星期三\n");
        break;
    default:
        printf("都不是");
    };
    return 0;
}